示例#1
0
func valueToString(v reflect.Value) (string, os.Error) {
	if v == nil {
		return "null", nil
	}

	switch v := v.(type) {
	case *reflect.PtrValue:
		return valueToString(reflect.Indirect(v))
	case *reflect.InterfaceValue:
		return valueToString(v.Elem())
	case *reflect.BoolValue:
		x := v.Get()
		if x {
			return "true", nil
		} else {
			return "false", nil
		}

	case *reflect.IntValue:
		return strconv.Itoa(v.Get()), nil
	case *reflect.Int8Value:
		return strconv.Itoa(int(v.Get())), nil
	case *reflect.Int16Value:
		return strconv.Itoa(int(v.Get())), nil
	case *reflect.Int32Value:
		return strconv.Itoa(int(v.Get())), nil
	case *reflect.Int64Value:
		return strconv.Itoa64(v.Get()), nil

	case *reflect.UintValue:
		return strconv.Uitoa(v.Get()), nil
	case *reflect.Uint8Value:
		return strconv.Uitoa(uint(v.Get())), nil
	case *reflect.Uint16Value:
		return strconv.Uitoa(uint(v.Get())), nil
	case *reflect.Uint32Value:
		return strconv.Uitoa(uint(v.Get())), nil
	case *reflect.Uint64Value:
		return strconv.Uitoa64(v.Get()), nil
	case *reflect.UintptrValue:
		return strconv.Uitoa64(uint64(v.Get())), nil

	case *reflect.FloatValue:
		return strconv.Ftoa(v.Get(), 'g', -1), nil
	case *reflect.Float32Value:
		return strconv.Ftoa32(v.Get(), 'g', -1), nil
	case *reflect.Float64Value:
		return strconv.Ftoa64(v.Get(), 'g', -1), nil

	case *reflect.StringValue:
		return v.Get(), nil
	case *reflect.SliceValue:
		typ := v.Type().(*reflect.SliceType)
		if _, ok := typ.Elem().(*reflect.Uint8Type); ok {
			return string(v.Interface().([]byte)), nil
		}
	}
	return "", os.NewError("Unsupported type")
}
// Encode values fro each field
func encodeParamValues(a []interface{}) ([]byte, int) {
	var b []byte
	for i := 0; i < len(a); i++ {
		f := a[i]
		switch t := f.(type) {
		case string:
			b = append(b, packString(string(t))...)
		case int:
			b = append(b, packString(strconv.Itoa(int(t)))...)
		case float:
			b = append(b, packString(strconv.Ftoa(float(t), 'f', -1))...)
		}
	}
	return b, len(b)
}
示例#3
0
文件: Runtime.go 项目: sombr/Perlito
func (i Num) f_Str(Capture) *Any   { return toStr(strconv.Ftoa(float(i), 'g', -1)) }
示例#4
0
func (e *encodeState) reflectValue(v reflect.Value) {
	if v == nil {
		e.WriteString("null")
		return
	}

	if j, ok := v.Interface().(Marshaler); ok {
		b, err := j.MarshalJSON()
		if err == nil {
			// copy JSON into buffer, checking validity.
			err = Compact(&e.Buffer, b)
		}
		if err != nil {
			e.error(&MarshalerError{v.Type(), err})
		}
		return
	}

	switch v := v.(type) {
	case *reflect.BoolValue:
		x := v.Get()
		if x {
			e.WriteString("true")
		} else {
			e.WriteString("false")
		}

	case *reflect.IntValue:
		e.WriteString(strconv.Itoa(v.Get()))
	case *reflect.Int8Value:
		e.WriteString(strconv.Itoa(int(v.Get())))
	case *reflect.Int16Value:
		e.WriteString(strconv.Itoa(int(v.Get())))
	case *reflect.Int32Value:
		e.WriteString(strconv.Itoa(int(v.Get())))
	case *reflect.Int64Value:
		e.WriteString(strconv.Itoa64(v.Get()))

	case *reflect.UintValue:
		e.WriteString(strconv.Uitoa(v.Get()))
	case *reflect.Uint8Value:
		e.WriteString(strconv.Uitoa(uint(v.Get())))
	case *reflect.Uint16Value:
		e.WriteString(strconv.Uitoa(uint(v.Get())))
	case *reflect.Uint32Value:
		e.WriteString(strconv.Uitoa(uint(v.Get())))
	case *reflect.Uint64Value:
		e.WriteString(strconv.Uitoa64(v.Get()))
	case *reflect.UintptrValue:
		e.WriteString(strconv.Uitoa64(uint64(v.Get())))

	case *reflect.FloatValue:
		e.WriteString(strconv.Ftoa(v.Get(), 'g', -1))
	case *reflect.Float32Value:
		e.WriteString(strconv.Ftoa32(v.Get(), 'g', -1))
	case *reflect.Float64Value:
		e.WriteString(strconv.Ftoa64(v.Get(), 'g', -1))

	case *reflect.StringValue:
		e.string(v.Get())

	case *reflect.StructValue:
		e.WriteByte('{')
		t := v.Type().(*reflect.StructType)
		n := v.NumField()
		for i := 0; i < n; i++ {
			if i > 0 {
				e.WriteByte(',')
			}
			f := t.Field(i)
			if f.Tag != "" {
				e.string(f.Tag)
			} else {
				e.string(f.Name)
			}
			e.WriteByte(':')
			e.reflectValue(v.Field(i))
		}
		e.WriteByte('}')

	case *reflect.MapValue:
		if _, ok := v.Type().(*reflect.MapType).Key().(*reflect.StringType); !ok {
			e.error(&UnsupportedTypeError{v.Type()})
		}
		if v.IsNil() {
			e.WriteString("null")
			break
		}
		e.WriteByte('{')
		var sv stringValues = v.Keys()
		sort.Sort(sv)
		for i, k := range sv {
			if i > 0 {
				e.WriteByte(',')
			}
			e.string(k.(*reflect.StringValue).Get())
			e.WriteByte(':')
			e.reflectValue(v.Elem(k))
		}
		e.WriteByte('}')

	case reflect.ArrayOrSliceValue:
		e.WriteByte('[')
		n := v.Len()
		for i := 0; i < n; i++ {
			if i > 0 {
				e.WriteByte(',')
			}
			e.reflectValue(v.Elem(i))
		}
		e.WriteByte(']')

	case interfaceOrPtrValue:
		if v.IsNil() {
			e.WriteString("null")
			return
		}
		e.reflectValue(v.Elem())

	default:
		e.error(&UnsupportedTypeError{v.Type()})
	}
	return
}
示例#5
0
func (conn *Conn) writeBind(stmt *Statement) {
	values := make([]string, len(stmt.params))

	var paramValuesLen int
	for i, param := range stmt.params {
		value := param.value
		if val, ok := value.(uint64); ok {
			value = int64(val)
		}

		switch val := value.(type) {
		case bool:
			if val {
				values[i] = "t"
			} else {
				values[i] = "f"
			}

		case byte:
			values[i] = string([]byte{val})

		case float:
			values[i] = strconv.Ftoa(val, 'f', -1)

		case float32:
			values[i] = strconv.Ftoa32(val, 'f', -1)

		case float64:
			values[i] = strconv.Ftoa64(val, 'f', -1)

		case int:
			values[i] = strconv.Itoa(val)

		case int16:
			values[i] = strconv.Itoa(int(val))

		case int32:
			values[i] = strconv.Itoa(int(val))

		case int64:
			switch param.typ {
			case Date:
				values[i] = time.SecondsToUTC(val).Format("2006-01-02")

			case Time, TimeTZ:
				values[i] = time.SecondsToUTC(val).Format("15:04:05")

			case Timestamp, TimestampTZ:
				values[i] = time.SecondsToUTC(val).Format("2006-01-02 15:04:05")

			default:
				values[i] = strconv.Itoa64(val)
			}

		case nil:

		case *big.Rat:
			if val.IsInt() {
				values[i] = val.Num().String()
			} else {
				// FIXME: Find a better way to do this.
				prec999 := val.FloatString(999)
				trimmed := strings.TrimRight(prec999, "0")
				sepIndex := strings.Index(trimmed, ".")
				prec := len(trimmed) - sepIndex - 1
				values[i] = val.FloatString(prec)
			}

		case string:
			values[i] = val

		case *time.Time:
			switch param.typ {
			case Date:
				values[i] = val.Format("2006-01-02")

			case Time, TimeTZ:
				values[i] = val.Format("15:04:05")

			case Timestamp, TimestampTZ:
				values[i] = val.Format("2006-01-02 15:04:05")

			default:
				panic("invalid use of *time.Time")
			}

		default:
			panic("unsupported parameter type")
		}

		paramValuesLen += len(values[i])
	}

	msgLen := int32(4 +
		len(stmt.portalName) + 1 +
		len(stmt.name) + 1 +
		2 + 2 +
		2 + len(stmt.params)*4 + paramValuesLen +
		2 + 2)

	conn.writeFrontendMessageCode(_Bind)
	conn.writeInt32(msgLen)
	conn.writeString0(stmt.portalName)
	conn.writeString0(stmt.name)
	conn.writeInt16(1)
	conn.writeInt16(int16(textFormat))
	conn.writeInt16(int16(len(stmt.params)))

	for i, param := range stmt.params {
		if param.value == nil {
			conn.writeInt32(-1)
		} else {
			conn.writeInt32(int32(len(values[i])))
			conn.writeString(values[i])
		}
	}

	conn.writeInt16(1)
	conn.writeInt16(int16(textFormat))

	conn.writeFlush()
}